<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org"  
      xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity3"  
      xmlns:shiro="http://www.pollix.at/thymeleaf/shiro">
	<head>
		<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
		<TITLE>ERP SYSTEM</TITLE>
		<META name="description" content="ERP.COM"/>
		
		<!-- 引入外部js或css -->
	    <script th:src="@{https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js}" type="text/javascript" ></script>
	    
	    <!-- 引入内部js或css -->
		<script th:src="${'/lib/layui/layui.js'}" type="text/javascript" charset="utf-8"></script>
		<script th:src="${'/js/xadmin.js'}" type="text/javascript"></script>
		<link th:href="${'/css/font.css'}" rel="stylesheet">
		<link th:href="${'/css/xadmin.css'}" rel="stylesheet">
	</head>
	
	<body class="login-bg">
		<div class="login" >
			<div class="message">企业资产管理系统-用户登录</div>
			<font  id="error" size="10" class="text-align:center" color="red"></font>
			<div id="darkbannerwrap"></div>
			<form method="post" class="layui-form">
				<input name="account" placeholder="用户名" type="text"
					class="layui-input">
				<hr class="hr15">
				<input name="password" placeholder="密码" type="password"
					class="layui-input">
				<hr class="hr15">
				<input type="text" value="" placeholder="请输入验证码（不区分大小写）" class="input-val">
            	<canvas id="canvas" width="100" height="43"></canvas>
				<hr class="hr15">
				<input lay-submit lay-filter="login" style="width: 100%;" id="loginButton" 
					type="button" value="登录" />
				<hr class="hr20">
				<div class="layui-form-item">
				<div class="layui-form-item" pane="">
					<input type="checkbox" lay-filter="filter" name="rememberMe" 
						id="rememberMe" lay-skin="primary" title="记住密码" >
					<!--<div style="float:right;margin-top: 10px;"><a href="/register">注册</a></div>-->
					<div style="float:right;margin-top: 10px;"><a href="/forget">忘记密码</a></div>
				</div>
			</form>
		</div>
	</body>
	<style>
		.input-val {
	        width: 230px!important;;
	        background: #ffffff;
	        height: 45px!important;;
	        padding: 0 2%;
	        border-radius: 5px;
	        border: none;
	        border: 1px solid rgba(0,0,0,.2);
	        font-size: 1.0625rem;
	    }
		#canvas {
	        float: right;
	        display: inline-block;
	        border: 1px solid #ccc;
	        border-radius: 5px;
	        cursor: pointer;
	    }
	</style>
	<script>
		$(document).ready(function() {
			var show_num = [];
		    draw(show_num);
	
		    $("#canvas").on('click',function(){
		        draw(show_num);
		    })
		    
			/*
			 * 用户登录
			 */
			$("#loginButton").bind("click", function() {
				var layer = layui.layer;
				var val = $(".input-val").val().toLowerCase();
		        var num = show_num.join("");
		        if(val==''){
		            layer.msg("请输入验证码！", {icon: 0});
		        }else if(val != num){
		        	layer.msg("验证码错误！请重新输入！", {icon: 0});
		            $(".input-val").val('');
		            draw(show_num);
		        }else{
		        	var user = {};
		        	user.account = $("[name='account']").val();
		        	user.password = $("[name='password']").val();
		        	user.rememberMe = $("[name='rememberMe']").prop('checked');
		        	$.ajax({
		        		url : "/doLogin",
		        		type : "post",
		        		contentType: "application/json",
		        		data : JSON.stringify(user),
		        		success : function (data) {
		        			if (data.status == 200) {
		        				location.href = "/index";
		        			} else {
		        				layer.msg(data.message, {icon: 0});
		        			}
		        		},
		        		error : function (data) {
		        			layer.msg(data.responseText, {icon: 0});
		        		}
		        	});
		        }
			});
		});
	
		function draw(show_num) {
		    var canvas_width=$('#canvas').width();
		    var canvas_height=$('#canvas').height();
		    var canvas = document.getElementById("canvas");//获取到canvas的对象，演员
		    var context = canvas.getContext("2d");//获取到canvas画图的环境，演员表演的舞台
		    canvas.width = canvas_width;
		    canvas.height = canvas_height;
		    var sCode = "A,B,C,E,F,G,H,J,K,L,M,N,P,Q,R,S,T,W,X,Y,Z,1,2,3,4,5,6,7,8,9,0";
		    var aCode = sCode.split(",");
		    var aLength = aCode.length;//获取到数组的长度
		    
		    for (var i = 0; i <= 3; i++) {
		        var j = Math.floor(Math.random() * aLength);//获取到随机的索引值
		        var deg = Math.random() * 30 * Math.PI / 180;//产生0~30之间的随机弧度
		        var txt = aCode[j];//得到随机的一个内容
		        show_num[i] = txt.toLowerCase();
		        var x = 10 + i * 20;//文字在canvas上的x坐标
		        var y = 20 + Math.random() * 8;//文字在canvas上的y坐标
		        context.font = "bold 23px 微软雅黑";
	
		        context.translate(x, y);
		        context.rotate(deg);
	
		        context.fillStyle = randomColor();
		        context.fillText(txt, 0, 0);
	
		        context.rotate(-deg);
		        context.translate(-x, -y);
		    }
		    for (var i = 0; i <= 5; i++) { //验证码上显示线条
		        context.strokeStyle = randomColor();
		        context.beginPath();
		        context.moveTo(Math.random() * canvas_width, Math.random() * canvas_height);
		        context.lineTo(Math.random() * canvas_width, Math.random() * canvas_height);
		        context.stroke();
		    }
		    for (var i = 0; i <= 30; i++) { //验证码上显示小点
		        context.strokeStyle = randomColor();
		        context.beginPath();
		        var x = Math.random() * canvas_width;
		        var y = Math.random() * canvas_height;
		        context.moveTo(x, y);
		        context.lineTo(x + 1, y + 1);
		        context.stroke();
		    }
		}
	
		function randomColor() {//得到随机的颜色值
		    var r = Math.floor(Math.random() * 256);
		    var g = Math.floor(Math.random() * 256);
		    var b = Math.floor(Math.random() * 256);
		    return "rgb(" + r + "," + g + "," + b + ")";
		}
	</script>
</html>